How about using tags/links to associate attributes with requirements?
This could be as simple as adding a link, fo e.g. :
* If it is traceable or not
+ \[[attributes/traceable]]
+ \[[attributes/untraceable]]
* Its criticality level
+ \[[attributes/level/critical]]
+ \[[attributes/level/important]]
+ etc.
* Its priority
+ \[[attributes/priority/low]]
+ \[[attributes/priority/high]]
* If it is functional or not
+ \[[attributes/functional]]
+ \[[attributes/non-functional]]
You just have to create pages for each attribute you want and then pagespec could be used to filter requirements by attributes. I think something similar is used to trac bug with ikiwiki (linking to a \[[done]] page, etc.).
Generally speaking, I think it's always a good idea to get back to the "basics" for something, that huge and expensive tools were made for. But I'm doubtful if such a text oriented tool would really fit all needs of a requirements engineering tool... so what is your real world experience with your requirements engineering tool as described?
